Say goodbye to murky pool water with the Intex Filter Cartridge Twin Pack, designed to keep your swimming oasis fresh and inviting. Regularly swapping out your filter ensures a sparkling clean pool for your next island soiree. Remember, give it a rinse weekly with a gentle hose shower and replace it every 4 weeks for optimal performance. Compatible with a range of Intex filter pumps, including models 28603, 28604, 28637, and more.